EP 3556485 B1 20231018 - METHOD, PROCESS MODULE AND APPARATUS FOR ROLLING AN EXTERNAL PIPE THREAD
Title (en)
METHOD, PROCESS MODULE AND APPARATUS FOR ROLLING AN EXTERNAL PIPE THREAD
Title (de)
VERFAHREN, PROZESSMODUL UND VORRICHTUNG ZUM ROLLEN EINES ROHRAUSSENGEWINDES
Title (fr)
PROCÉDÉ, MODULE DE PROCÉDÉ ET APPAREIL DE ROULAGE D'UN FILET EXTÉRIEUR D'UN TUBE
Publication
Application
Priority
- CN 201611146711 A 20161213
- CN 2017115963 W 20171213
Abstract (en)
[origin: EP3556485A1] Provided is a method for performing an external pipe thread process on a hollow blank by at least twice rolling: firstly, the first rolling wheel group rolls the outer surface of the hollow blank into a threaded cylindrical surface or a threaded conical surface or a threaded cylindrical conical mixing surface, and secondly, the second rolling wheel group rolls again for the outer surface of the hollow blank which has processed in step1, and rolling to form an external pipe thread; wherein the number of rolling wheels in a rolling wheel group, used in any two back-to-back rolling processes in a processing sequence, are different in parity. Further provided are various rolling head, module, apparatuses and production line for pipe thread, achieving the above processing method and having a simple structure, portability and practicality. When preforming an external pipe thread rolling process of the hollow blank, thereby improving a processing yield; in addition, the invention also provides a threaded cylindrical surface or a threaded conical surface or threaded cylindrical conical mixing surface products by the first rolling wheel group.
IPC 8 full level
B21H 3/04 (2006.01)
CPC (source: CN EP US)
B21B 27/024 (2013.01 - US); B21H 3/04 (2013.01 - CN EP); B21H 3/042 (2013.01 - CN EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3556485 A1 20191023; EP 3556485 A4 20201216; EP 3556485 B1 20231018; EP 3556485 C0 20231018; AU 2017376521 A1 20190718; AU 2021204565 A1 20210729; AU 2021204565 B2 20230810; CA 3047042 A1 20180621; CA 3047042 C 20220719; CN 108907046 A 20181130; CN 108907046 B 20210129; ES 2965734 T3 20240416; HK 1258439 A1 20191115; JP 2020500718 A 20200116; JP 6732273 B2 20200729; US 11273483 B2 20220315; US 2020086376 A1 20200319; WO 2018108105 A1 20180621
DOCDB simple family (application)
EP 17882130 A 20171213; AU 2017376521 A 20171213; AU 2021204565 A 20210630; CA 3047042 A 20171213; CN 201711328883 A 20171213; CN 2017115963 W 20171213; ES 17882130 T 20171213; HK 19100359 A 20190109; JP 2019531398 A 20171213; US 201716469627 A 20171213